| T O P I C R E V I E W |
| coolice |
Posted - Jun 22 2016 : 17:21:33
Hi!
I am looking for a good component, which can help me to PERFECTLY OCR an image like this one:
I downloaded to compiled demo, to check OCR, but even after I tried several options, I could not make it working well.
If I am not mistaken, it is possible to "train" the ocr db, but I dont know how. Could anyone help me on this?
Many thanks for your time and help,
Moore
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| 12 L A T E S T R E P L I E S (Newest First) |
| w2m |
Posted - Jun 28 2016 : 09:44:37
How can I capture a specific rectangle part of the screen by ImageEn?
Apprehend supports capturing a rectangle and has a few features that ImageEn does not have with respect to screen capture. The component is quite old, but still functions with the latest versions of Delphi.
iBitmap := ASGScreenCapture1.CaptureSelection;
try
if (Assigned(iBitmap)) and (not iBitmap.Empty) then
begin
iBitmap.PixelFormat := pf24bit;
ImageEnView.IEBitmap.Assign(iBitmap);
ImageEnView.IO.Params.BitsPerSample := 8;
ImageEnView.IO.Params.SamplesPerPixel := 3;
ImageEnView.IO.Params.Width := iBitmap.Width;
ImageEnView.IO.Params.Height := iBitmap.Height;
end;
finally
iBitmap.Free;
end;
http://www.frontiernet.net/~w2m/Apprehend62.zip
Bill Miller
Adirondack Software & Graphics
Email: w2m@hughes.net
EBook: http://www.imageen.com/ebook/
Custom Commercial ImageEn Development |
| xequte |
Posted - Jun 28 2016 : 03:24:23
Hi Moore
No at this time, i'm afraid.
Nigel
Xequte Software
www.xequte.com
nigel@xequte.com
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| coolice |
Posted - Jun 27 2016 : 19:19:43
Hi Nigel,
Thank you for your reply!
Indeed, you were right about the cropping, I got mixed up with the coordinates
May I ask:
1. Is there anyway to capture a specific window client area only, not the full screen? (I have the specific window HWND)
Many many thanks,
Moore
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| xequte |
Posted - Jun 26 2016 : 19:38:28
Hi Andras
2. Your Y2 value is less than your Y1 value so the crop is not valid
3. There are often C++ programmers on this forum, including the very skilled Sinisa, so if you have any difficulty they should be able to give you a heads up. Otherwise for generic Delphi to C++ conversion you can get responses very rapidly on stackoverflow.com
Probably CompareWith with a certain threshold would work best...
v := ImageEnView1.Proc.CompareWith(ImageEnView2.IEBitmap, nil);
label16.Caption := floattostr(v * 100) + ' %';
Nigel
Xequte Software
www.xequte.com
nigel@xequte.com
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| coolice |
Posted - Jun 26 2016 : 10:18:00
Big thank you for your help!
1.
Sorry to ask so many questions, but I only found Delphi demos and also in our last post is Delphi code, while I am coding in C++, and since I am not core professional, translate between Delphi and C++ is not easy.
BUT, I had found the proper way. I post it here, so in case some other C++ clients ran into this simple task, has a solution:
TImageEnIO * test = new TImageEnView(this);
The solution to the problem was to use : (this) , instead of NULL.
2.
I believe that TImageEnView crop is the best option for me, thank you for suggesting it! Using the same solution as above to declare/use the component "invisible" plus using the help link you provided, I came up with this:
TImageEnView* main_imageenview = new TImageEnView(this);
main_imageenview->IO->CaptureFromScreen(iecsScreen, -1);
main_imageenview->IO->SaveToFile("D:\\screen.png");
main_imageenview->Proc->Crop(30,50,50+30,30+15);
main_imageenview->IO->SaveToFile("D:\\screen_cropped.png");
main_imageenview->IO->Free();
The problem is, that it does not do the cropping. As I could read here: http://www.imageen.com/help/TImageEnView.html , imagenview is a container, so I assume the cropping should occur, and when I save it, I save the cropped image, but it isnt.
I also tried to add:
main_imageenview->CurrentLayer->Cropped = true;
main_imageenview->LayersMergeAll();
but it did not work neither.
Could you help me please what am I doing wrong?
Also, its throw and exception when closing the app, so may I ask if I should Free up anything else than the IO ?
3.
May I ask if you have any C++ example for compare / imagesdiff ?
Basically, what I need to do is the following:
1. I crop and image and store it to a DB.
2. I crop and other image.
3. I compare both images runtime invisible weather they are exactly the same content or not.
To show you and example to fully answer your question:
Are these images the same content wise?
A.
B.
answer is: yes
Are these ?
A.
B
answer is: no
EVERY time, the cropping is the same, so same width/height images, so image content comparison.
As far as I see, I should go with: ComputeImageEquality , am I right ?
Many many thanks,
Moore |
| xequte |
Posted - Jun 23 2016 : 22:57:54
1. Something like:
io := TImageEnIO.Create(nil);
io.CaptureFromScreen(iecsScreen, -1);
io.SaveToFile('D:\screen.png');
io.Free;
2. Well firstly, you can just use the standard TCanvas CopyRect to copy the desired portion from one bitmap to another, but with a TIEBitmap you can also use Resize (does not resample, just changes adds/crops to the sides of the image):
http://www.imageen.com/help/TIEBitmap.Resize.html
Or if the image is in a TImageEnView, you can use ImageEnView1.Proc.CropSel();
http://www.imageen.com/help/TImageEnProc.CropSel.html
or without a selection:
http://www.imageen.com/help/TImageEnProc.Crop.html
3. Compare in what way? You should start by looking at the Compare and ImagesDiff demos in the \ImageAnalysis\ folder.
Nigel
Xequte Software
www.xequte.com
nigel@xequte.com |
| coolice |
Posted - Jun 23 2016 : 18:58:57
Hi Nigel,
Thank you again!
May I ask:
Allow me to ask 3 more questions please:
1. How can I utilize ImageEnView without placing the component on the form? (I need to capture the screen, but I don't need the component on the form.)
2. May I ask what is the simple way to cropping with ImageEn?
3. What is the fastest way to compare 2 cropped image with ImageEn?
Many Thanks,
Moore
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| xequte |
Posted - Jun 23 2016 : 04:03:12
Hi Moore
You can use the CaptureFromScreen method. If you only want a particular rect then copy from the returned bitmap, or crop it:
http://www.imageen.com/help/TImageEnIO.CaptureFromScreen.html
Nigel
Xequte Software
www.xequte.com
nigel@xequte.com |
| coolice |
Posted - Jun 23 2016 : 01:50:44
Hi Nigel,
Thank you for your reply.
May I ask also your help on my second question as well please:
How can i capture a specific rectangle part of the screen by ImageEn?
Many Thanks,
Moore |
| xequte |
Posted - Jun 22 2016 : 19:46:21
Hi Moore
If you create training data using the standard Tesseract method, then IEVision can use that training data:
https://github.com/tesseract-ocr/tesseract/wiki/TrainingTesseract
Nigel
Xequte Software
www.xequte.com
nigel@xequte.com
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| coolice |
Posted - Jun 22 2016 : 19:32:56
Hi Nigel,
Thank you for your kind reply!
This is the highest quality I can capture manually.
I got the very same result what you listed, but unfortunately, reasonable result is not good enough in my case, I need exact results. BUT, I assume, if I take time to train the OCR engine for these very specific numbers, I can reach 100% result. IF I am not mistaken.
Is there any way how could I train ImageEn ocr data?
Also, may I ask your help, how can i capture a specific part of the screen by ImageEn?
I know it sounds stupid, but I dump, and cannot find this simple function. I would like to capture these number part of the screen with ImageEn. Could you help me how can I do it please?
Many many thanks,
Moore |
| xequte |
Posted - Jun 22 2016 : 19:22:18
Hi Moore
Our OCR made a reasonable attempt at the image:
1B 16 36 12 11 E 9 31
Did you try using a higher resolution image as your source?
Unfortunately training is not available via our library, but it is based on the widely used Tesseract library, so there may be ways to do it.
Nigel
Xequte Software
www.xequte.com
nigel@xequte.com
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